TAP138278
SubstationIllinois · AMEREN ILLINOIS COMPANY
TAP138278 is an electric transmission substation in Illinois, operated by AMEREN ILLINOIS COMPANY. It is classified as high-voltage (345 kv) and connects 3 transmission lines. Substation proximity is one of the strongest speed-to-power signals for siting a datacenter — interconnection distance to an energized, high-voltage bus is often the binding constraint on time-to-energization.
Voltage & classification
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #39427 | 345 kV | — | IN SERVICE | 12.3 mi |
| #42134 | 345 kV | AMEREN ILLINOIS COMPANY | IN SERVICE | 8.5 mi |
| #58121 | 345 kV | — | IN SERVICE | 1.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP138278, ranked by DC Readiness. Sites this close to an energized substation carry a strong speed-to-power advantage.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| CLINTON STATION | Substation-Adjacent | IL | De Witt County | 345 kV | 600 MW | 4.6 yrs | 70.9 |
| GOOSE CREEK | Substation-Adjacent | IL | Piatt County | 345 kV | 600 MW | 4.6 yrs | 70.8 |
| TAP138277 | Substation-Adjacent | IL | Piatt County | 345 kV | 600 MW | 4.6 yrs | 70.6 |
| FARADAY | Substation-Adjacent | IL | Macon County | 345 kV | 600 MW | 4.6 yrs | 70.0 |
| TAP170250 | Substation-Adjacent | IL | De Witt County | 345 kV | 600 MW | 4.6 yrs | 68.6 |
| OREANA | Substation-Adjacent | IL | Macon County | 345 kV | 600 MW | 4.6 yrs | 68.3 |
| TAP138278 | Substation-Adjacent | IL | De Witt County | 345 kV | 600 MW | 4.6 yrs | 68.0 |
| SOUTH BLOOMINGTON | Substation-Adjacent | IL | McLean County | 345 kV | 600 MW | 4.6 yrs | 67.6 |
Dataset updated . Screening estimates derived from public data sources.
Substation attributes are derived from public HIFLD / EIA infrastructure data and may lag real-world upgrades or retirements. Voltage and connected-line counts are screening figures — confirm available capacity and interconnection terms directly with the operating utility and ISO.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for TAP138278 substation, Illinois. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.